Earlier quoted context omitted.
Before I go further: do you own a smartphone? If not, you can ignore the rest. So, assuming you have a smartphone. That is a device which has: - Permanent network connection. Doesn't matter what you do on your Wifi, it has the cellular data network. Which is controlled by an independent processor with its own firmware - Excellent noise-cancellation microphones. They may not be able to pinpoint the sound source like a…
> Similar functionality to an Echo / Google Home / Apple whatever. They'll be listening for "hey siri" or "ok google" This seems to be a pretty big assumption, without which your whole argument falls apart. In my case, at least, I have no such functionality enabled. You could argue that the manufacturer of my phone could push a software update that enables it without my knowledge (in fact, they likely couldn't, becau…
...the malicious entity already pushed it out silently in the last update you did accept...
You really have to trust the entity building the software on these devices. These little half-measures are purely psychological protection.